The U.S. aircraft register, updated daily
Parts

Form

No failure report names the form. 3 FAA approvals let 1 company make a replacement form, Carson Helicopters, INC. holding the most (3).

Approved replacement parts 3 parts manufacturer approvals

A parts manufacturer approval (PMA) lets a company other than the aircraft's maker make a form and sell it as an approved part for the models named. These are the companies holding such approvals for a form:

For these models most: Sikorsky S-61 (3).

MakerPartReplacesFitsGrantedStatus
Carson Helicopters, INC.Form, Corner Clip 15103-33Modification PartSikorsky S-61N2021-08-23current
Carson Helicopters, INC.Form, Corner S6120-62551-2Modification PartSikorsky S-61N2021-08-23current
Carson Helicopters, INC.Form, Corner S6120-62551-1Modification PartSikorsky S-61N2021-08-23current

Sources: the FAA's service difficulty reports since 1995 (a report is a part that failed and was fixed, as filed by an airline, repair station or owner; the count shows reporting as much as reliability) and the parts manufacturer approvals in the FAA's Dynamic Regulatory System. The part name is the reporters' and the approval holders' own words, reduced to the first plain words so that spellings meet.